x86: kconfig: Imply HAVE_INTEL_ME in the platform Kconfig

Intel Management Engine is required by the platform, however it's
not a must have when building a U-Boot image. For example, during
development normally programming ME firmware is a one-time effort.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/ivybridge/Kconfig b/arch/x86/cpu/ivybridge/Kconfig
index e23d01a..ed6b834 100644
--- a/arch/x86/cpu/ivybridge/Kconfig
+++ b/arch/x86/cpu/ivybridge/Kconfig
@@ -8,6 +8,7 @@
 config NORTHBRIDGE_INTEL_IVYBRIDGE
 	bool
 	select CACHE_MRC_BIN if HAVE_MRC
+	imply HAVE_INTEL_ME
 
 if NORTHBRIDGE_INTEL_IVYBRIDGE